<template>
    <div>
      <!--面包屑导航区域-->
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>数据统计</el-breadcrumb-item>
        <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 2.为 ECharts 准备一个定义了宽高的 DOM -->
            <div id="main" style="width: 750px;height:400px;"></div>
        </el-card>
    </div>
</template>

<script>
// 1.导入 echarts
import * as echarts from 'echarts'
import _ from 'lodash'
// import echarts from 'echarts'

export default{
        data(){
            return {
                options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ]
        }
            }
        },
        created(){},
        // 此时，页面是的元素，已经被渲染完毕了
        async mounted(){
            // 基于准备好的dom，初始化echarts实例
            var myChart = echarts.init(document.getElementById('main'));

            const {data:res}= await this.$http.get('reports/type/1')
            if(res.meta.status!==200){
                return this.$message.error('获取折线图数据失败！')
            }

            // 4.准备数据和配置顶
            const result= _.merge(res.data,this.options)
            // 5.展示数据
            myChart.setOption(result);
        },
        methods:{}
    }
</script>

<style scoped>

</style>